(I was utterly unsuccessful this morning in posting a comment or a
patch to the issue in jira, receiving JS errors and server-side
NullPointerExceptions all over the place, so please forgive me for
emailing the list directly.)
We have also encountered the issue of thread safety in the Enum
class. In our case, it shows up when running in a application server
where there are many threads and other applications are loading
classes at arbitrary times.
I've attached the patch that we are using which seems to correct this
issue for us. Rather than synchronize all access to the cEnumClasses
map (which seems like it would be rather expensive and highly
contended), we adopted a copy-on-write approach that only involves
synchronization when new classes are loaded.
Jason
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